Remove an unused variable (should shut up a warning from GCC 4.6).

[originally from svn r9111]

psftp.c

@@ -2842,7 +2842,6 @@ int psftp_main(int argc, char *argv[])
     int mode = 0;
     int modeflags = 0;
     char *batchfile = NULL;
-    int errors = 0;
 
     flags = FLAG_STDERR | FLAG_INTERACTIVE
 #ifdef FLAG_SYNCAGENT
@@ -2858,7 +2857,6 @@ int psftp_main(int argc, char *argv[])
     do_defaults(NULL, &cfg);
     loaded_session = FALSE;
 
-    errors = 0;
     for (i = 1; i < argc; i++) {
 	int ret;
 	if (argv[i][0] != '-') {